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The W. M. Keck Observatory’s two spherical white Keck I and Keck II telescopes near the summit of Mauna Kea have been dubbed “the golf balls.” (Dana Freeborn/Community Contributor)
The W. M. Keck Observatory’s two spherical white Keck I and Keck II telescopes near the summit of Mauna Kea have been dubbed “the golf balls.” (Dana Freeborn/Community Contributor)
The Gemini North Telescope at the summit of Mauna Kea has its panels opened to allow the interior to cool to outdoor temperature at sunset Jan. 12. (Dana Freeborn/Community Contributor)